A DCO sign-off is a line placed at the end of a commit message containing a contributor’s signature. In adding this, the contributor certifies that they have the right to contribute the material.
Here are the steps to sign one’s work:
Once the contributor certifies the DCO below (from developercertificate.org):
Developer Certificate of Origin Version 1.1 Copyright (C) 2004, 2006 The Linux Foundation and its contributors. 1 Letterman Drive Suite D4700 San Francisco, CA, 94129 Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Developer's Certificate of Origin 1.1 By making a contribution to this project, I certify that: (a) The contribution was created in whole or in part by me and I have the right to submit it under the open source license indicated in the file; or (b) The contribution is based upon previous work that, to the best of my knowledge, is covered under an appropriate open source license and I have the right under that license to submit that work with modifications, whether created in whole or in part by me, under the same open source license (unless I am permitted to submit under a different license), as indicated in the file; or (c) The contribution was provided directly to me by some other person who certified (a), (b) or (c) and I have not modified it. (d) I understand and agree that this project and the contribution are public and that a record of the contribution (including all personal information I submit with it, including my sign-off) is maintained indefinitely and may be redistributed consistent with this project or the open source license(s) involved.
The contributor then just needs to add a line to every git commit message:
Signed-off-by: Joe Smith <email@example.com>
One’s real name must be used (no pseudonyms or anonymous contributions).
The easiest way to do this is, assuming
user.email are set via
the git cli configuration (
git config), is to sign commits automatically via
git commit -s.
git log information for a commit should show something like this:
Author: Joe Smith <firstname.lastname@example.org> Date: Thu Feb 2 11:41:15 2018 -0800 Update README Signed-off-by: Joe Smith <email@example.com>
Signed-off-by lines match. If they don’t,
the PR will be rejected by the automated DCO check.